/* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
 * Copyright (C) 1992-1993 Jean-loup Gailly
 * The unzip code was written and put in the public domain by Mark Adler.
 * Portions of the lzw code are derived from the public domain 'compress'
 * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
 * Ken Turkowski, Dave Mack and Peter Jannesen.
 *
 * See the license_msg below and the file COPYING for the software license.
 * See the file algorithm.doc for the compression algorithms and file formats.
 */

static char  *license_msg[] = {
		"   Copyright (C) 1992-1993 Jean-loup Gailly",
		"   This program is free software; you can redistribute it and/or modify",
		"   it under the terms of the GNU General Public License as published by",
		"   the Free Software Foundation; either version 2, or (at your option)",
		"   any later version.",
		"",
		"   This program is distributed in the hope that it will be useful,",
		"   but WITHOUT ANY WARRANTY; without even the implied warranty of",
		"   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the",
		"   GNU General Public License for more details.",
		"",
		"   You should have received a copy of the GNU General Public License",
		"   along with this program; if not, write to the Free Software",
		"   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.",
		0};

/* Compress files with zip algorithm and 'compress' interface.
 * See usage() and help() functions below for all options.
 * Outputs:
 *        file.gz:   compressed file with same mode, owner, and utimes
 *     or stdout with -c option or if stdin used as input.
 * If the output file name had to be truncated, the original name is kept
 * in the compressed file.
 * On MSDOS, file.tmp -> file.tmz. On VMS, file.tmp -> file.tmp-gz.
 *
 * Using gz on MSDOS would create too many file name conflicts. For
 * example, foo.txt -> foo.tgz (.tgz must be reserved as shorthand for
 * tar.gz). Similarly, foo.dir and foo.doc would both be mapped to foo.dgz.
 * I also considered 12345678.txt -> 12345txt.gz but this truncates the name
 * too heavily. There is no ideal solution given the MSDOS 8+3 limitation. 
 *
 * For the meaning of all compilation flags, see comments in Makefile.in.
 */

#ifdef RCSID
	static char rcsid[] = "$Id: gzip.c,v 0.24 1993/06/24 10:52:07 jloup Exp $";
#endif


#include <pthread.h>

#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/stat.h>
#include <errno.h>

#include "tailor.h"
#include "gzip.h"
#include "lzw.h"
#include "revision.h"
#include "getopt.h"

/* configuration */

#ifdef NO_TIME_H
#  include <sys/time.h>
#else
#  include <time.h>
#endif

#ifndef NO_FCNTL_H
#  include <fcntl.h>
#endif

#ifdef HAVE_UNISTD_H
#  include <unistd.h>
#endif

#if defined(STDC_HEADERS) || !defined(NO_STDLIB_H)
#  include <stdlib.h>
#else
extern int errno;
#endif

#if defined(DIRENT)
#  include <dirent.h>
typedef struct dirent dir_type;
#  define NLENGTH(dirent) ((int)strlen((dirent)->d_name))
#  define DIR_OPT "DIRENT"
#else
#  define NLENGTH(dirent) ((dirent)->d_namlen)
#  ifdef SYSDIR
#    include <sys/dir.h>
typedef struct direct dir_type;
#    define DIR_OPT "SYSDIR"
#  else
#    ifdef SYSNDIR
#      include <sys/ndir.h>
typedef struct direct dir_type;
#      define DIR_OPT "SYSNDIR"
#    else
#      ifdef NDIR
#        include <ndir.h>
typedef struct direct dir_type;
#        define DIR_OPT "NDIR"
#      else
#        define NO_DIR
#        define DIR_OPT "NO_DIR"
#      endif
#    endif
#  endif
#endif

#ifndef NO_UTIME
#  ifndef NO_UTIME_H
#    include <utime.h>
#    define TIME_OPT "UTIME"
#  else
#    ifdef HAVE_SYS_UTIME_H
#      include <sys/utime.h>
#      define TIME_OPT "SYS_UTIME"
#    else
struct utimbuf {
	time_t actime;
	time_t modtime;
};
#      define TIME_OPT ""
#    endif
#  endif
#else
#  define TIME_OPT "NO_UTIME"
#endif

#if !defined(S_ISDIR) && defined(S_IFDIR)
#  define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
#if !defined(S_ISREG) && defined(S_IFREG)
#  define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif

typedef RETSIGTYPE (*sig_type) OF((int));

#ifndef	O_BINARY
#  define  O_BINARY  0  /* creation mode for open() */
#endif

#ifndef O_CREAT
/* Pure BSD system? */
#  include <sys/file.h>
#  ifndef O_CREAT
#    define O_CREAT FCREAT
#  endif
#  ifndef O_EXCL
#    define O_EXCL FEXCL
#  endif
#endif

#ifndef S_IRUSR
#  define S_IRUSR 0400
#endif
#ifndef S_IWUSR
#  define S_IWUSR 0200
#endif
#define RW_USER (S_IRUSR | S_IWUSR)  /* creation mode for open() */

#ifndef MAX_PATH_LEN
#  define MAX_PATH_LEN   1024 /* max pathname length */
#endif

#ifndef SEEK_END
#  define SEEK_END 2
#endif

#ifdef NO_OFF_T
typedef long off_t;
off_t lseek OF((int fd, off_t offset, int whence));
#endif

/* Separator for file name parts (see shorten_name()) */
#ifdef NO_MULTIPLE_DOTS
#  define PART_SEP "-"
#else
#  define PART_SEP "."
#endif

/* global buffers */

DECLARE(uch, inbuf,  INBUFSIZ +INBUF_EXTRA);
DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
DECLARE(ush, d_buf,  DIST_BUFSIZE);
DECLARE(uch, window, 2L*WSIZE);
#ifndef MAXSEG_64K
DECLARE(ush, tab_prefix, 1L<<BITS);
#else
DECLARE(ush, tab_prefix0, 1L<<(BITS-1));
DECLARE(ush, tab_prefix1, 1L<<(BITS-1));
#endif

/* local variables */

int ascii = 0;        /* convert end-of-lines to local OS conventions */
int to_stdout = 0;    /* output to stdout (-c) */
int decompress = 0;   /* decompress (-d) */
int force = 0;        /* don't ask questions, compress links (-f) */
int no_name = -1;     /* don't save or restore the original file name */
int no_time = -1;     /* don't save or restore the original file time */
int recursive = 0;    /* recurse through directories (-r) */
int list = 0;         /* list the file contents (-l) */
int verbose = 0;      /* be verbose (-v) */
int quiet = 0;        /* be very quiet (-q) */
int do_lzw = 0;       /* generate output compatible with old compress (-Z) */
int test = 0;         /* test .gz file integrity */
int foreground;       /* set if program run in foreground */
char *progname;       /* program name */
int maxbits = BITS;   /* max bits per code for LZW */
int method = DEFLATED;/* compression method */
int level = 6;        /* compression level */
int exit_code = OK;   /* program exit code */
int save_orig_name;   /* set if original name must be saved */
int last_member;      /* set for .zip and .Z files */
int part_nb;          /* number of parts in .gz file */
long time_stamp;      /* original time stamp (modification time) */
long ifile_size;      /* input file size, -1 for devices (debug only) */
char *env;            /* contents of GZIP env variable */
char **args = NULL;   /* argv pointer if GZIP env variable defined */
char z_suffix[MAX_SUFFIX+1]; /* default suffix (can be set with --suffix) */
int  z_len;           /* strlen(z_suffix) */

long bytes_in;             /* number of input bytes */
long bytes_out;            /* number of output bytes */
long total_in = 0;         /* input bytes for all files */
long total_out = 0;        /* output bytes for all files */
char ifname[MAX_PATH_LEN]; /* input file name */
char ofname[MAX_PATH_LEN]; /* output file name */
int  remove_ofname = 0;	   /* remove output file on error */
struct stat istat;         /* status for input file */
int  ifd;                  /* input file descriptor */
int  ofd;                  /* output file descriptor */
unsigned insize;           /* valid bytes in inbuf */
unsigned inptr;            /* index of next byte to be processed in inbuf */
unsigned outcnt;           /* bytes in output buffer */

struct option longopts[] =
{
		/* { name  has_arg  *flag  val } */
		{"ascii",      0, 0, 'a'}, /* ascii text mode */
		{"to-stdout",  0, 0, 'c'}, /* write output on standard output */
		{"stdout",     0, 0, 'c'}, /* write output on standard output */
		{"decompress", 0, 0, 'd'}, /* decompress */
		{"uncompress", 0, 0, 'd'}, /* decompress */
		/* {"encrypt",    0, 0, 'e'},    encrypt */
		{"force",      0, 0, 'f'}, /* force overwrite of output file */
		{"help",       0, 0, 'h'}, /* give help */
		/* {"pkzip",      0, 0, 'k'},    force output in pkzip format */
		{"list",       0, 0, 'l'}, /* list .gz file contents */
		{"license",    0, 0, 'L'}, /* display software license */
		{"no-name",    0, 0, 'n'}, /* don't save or restore original name & time */
		{"name",       0, 0, 'N'}, /* save or restore original name & time */
		{"quiet",      0, 0, 'q'}, /* quiet mode */
		{"silent",     0, 0, 'q'}, /* quiet mode */
		{"recursive",  0, 0, 'r'}, /* recurse through directories */
		{"suffix",     1, 0, 'S'}, /* use given suffix instead of .gz */
		{"test",       0, 0, 't'}, /* test compressed file integrity */
		{"no-time",    0, 0, 'T'}, /* don't save or restore the time stamp */
		{"verbose",    0, 0, 'v'}, /* verbose mode */
		{"version",    0, 0, 'V'}, /* display version number */
		{"fast",       0, 0, '1'}, /* compress faster */
		{"best",       0, 0, '9'}, /* compress better */
		{"lzw",        0, 0, 'Z'}, /* make output compatible with old compress */
		{"bits",       1, 0, 'b'}, /* max number of bits per code (implies -Z) */
		{ 0, 0, 0, 0 }
};

/* local functions */

local void usage        OF((void));
local void help         OF((void));
local void license      OF((void));
local void version      OF((void));
local void treat_stdin  OF((void));
local void treat_file   OF((void *iname));
local int create_outfile OF((void));
local int  do_stat      OF((char *name, struct stat *sbuf));
local char *get_suffix  OF((char *name));
local int  get_istat    OF((char *iname, struct stat *sbuf));
local int  make_ofname  OF((void));
local int  same_file    OF((struct stat *stat1, struct stat *stat2));
local int name_too_long OF((char *name, struct stat *statb));
local void shorten_name  OF((char *name));
local int  get_method   OF((int in));
local void do_list      OF((int ifd, int method));
local int  check_ofname OF((void));
local void copy_stat    OF((struct stat *ifstat));
local void do_exit      OF((int exitcode));
int main          OF((int argc, char **argv));
int (*work) OF((int infile, int outfile)) = zip; /* function to call */

#ifndef NO_DIR
local void treat_dir    OF((char *dir));
#endif
#ifndef NO_UTIME
local void reset_times  OF((char *name, struct stat *statb));
#endif

#define strequ(s1, s2) (strcmp((s1),(s2)) == 0)

/* ======================================================================== */
local void usage()
{
	fprintf(stderr, "usage: %s [-%scdfhlLnN%stvV19] [-S suffix] [file ...]\n",
			progname,
#if O_BINARY
			"a",
#else
			"",
#endif
#ifdef NO_DIR
			""
#else
			"r"
#endif
	);
}

struct thread_data{
   long  thread_id;
   char iname[MAX_PATH_LEN];
   char ifname[MAX_PATH_LEN];
   char ofname[MAX_PATH_LEN];
};


void printThreadData(char* methodName, struct thread_data td) {
	printf("%s -> TD[tid:%lu | iname:%s | ifname:%s | ofname:%s | ]\n", methodName, td.thread_id, td.iname, td.ifname, td.ofname);
}

/* ======================================================================== */
int main (argc, argv)
int argc;
char **argv;
{
	int file_count;     /* number of files to precess */
	int proglen;        /* length of progname */
	int optc;           /* current option */

	EXPAND(argc, argv); /* wild card expansion if necessary */

	progname = basename(argv[0]);
	proglen = strlen(progname);

	/* Suppress .exe for MSDOS, OS/2 and VMS: */
	if (proglen > 4 && strequ(progname+proglen-4, ".exe")) {
		progname[proglen-4] = '\0';
	}

	/* Add options in GZIP environment variable if there is one */
	env = add_envopt(&argc, &argv, OPTIONS_VAR);
	if (env != NULL) args = argv;

	foreground = signal(SIGINT, SIG_IGN) != SIG_IGN;
	if (foreground) {
		(void) signal (SIGINT, (sig_type)abort_gzip);
	}
#ifdef SIGTERM
	if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
		(void) signal(SIGTERM, (sig_type)abort_gzip);
	}
#endif
#ifdef SIGHUP
	if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
		(void) signal(SIGHUP,  (sig_type)abort_gzip);
	}
#endif

#ifndef GNU_STANDARD
	/* For compatibility with old compress, use program name as an option.
	 * If you compile with -DGNU_STANDARD, this program will behave as
	 * gzip even if it is invoked under the name gunzip or zcat.
	 *
	 * Systems which do not support links can still use -d or -dc.
	 * Ignore an .exe extension for MSDOS, OS/2 and VMS.
	 */
	if (  strncmp(progname, "un",  2) == 0     /* ungzip, uncompress */
			|| strncmp(progname, "gun", 3) == 0) {  /* gunzip */
		decompress = 1;
	} else if (strequ(progname+1, "cat")       /* zcat, pcat, gcat */
			|| strequ(progname, "gzcat")) {    /* gzcat */
		decompress = to_stdout = 1;
	}
#endif

	strncpy(z_suffix, Z_SUFFIX, sizeof(z_suffix)-1);
	z_len = strlen(z_suffix);

	while ((optc = getopt_long (argc, argv, "ab:cdfhH?lLmMnNqrS:tvVZ123456789",
			longopts, (int *)0)) != EOF) {
		switch (optc) {
		case 'a':
			ascii = 1; break;
		case 'b':
			maxbits = atoi(optarg);
			break;
		case 'c':
			to_stdout = 1; break;
		case 'd':
			decompress = 1; break;
		case 'f':
			force++; break;
		case 'h': case 'H': case '?':
			help(); do_exit(OK); break;
		case 'l':
			list = decompress = to_stdout = 1; break;
		case 'L':
			license(); do_exit(OK); break;
		case 'm': /* undocumented, may change later */
			no_time = 1; break;
		case 'M': /* undocumented, may change later */
			no_time = 0; break;
		case 'n':
			no_name = no_time = 1; break;
		case 'N':
			no_name = no_time = 0; break;
		case 'q':
			quiet = 1; verbose = 0; break;
		case 'r':
#ifdef NO_DIR
			fprintf(stderr, "%s: -r not supported on this system\n", progname);
			usage();
			do_exit(ERROR); break;
#else
			recursive = 1; break;
#endif
		case 'S':
#ifdef NO_MULTIPLE_DOTS
			if (*optarg == '.') optarg++;
#endif
			z_len = strlen(optarg);
			strcpy(z_suffix, optarg);
			break;
		case 't':
			test = decompress = to_stdout = 1;
			break;
		case 'v':
			verbose++; quiet = 0; break;
		case 'V':
			version(); do_exit(OK); break;
		case 'Z':
#ifdef LZW
			do_lzw = 1; break;
#else
			fprintf(stderr, "%s: -Z not supported in this version\n",
					progname);
			usage();
			do_exit(ERROR); break;
#endif
		case '1':  case '2':  case '3':  case '4':
		case '5':  case '6':  case '7':  case '8':  case '9':
			level = optc - '0';
			break;
		default:
			/* Error message already emitted by getopt_long. */
			usage();
			do_exit(ERROR);
		}
	} /* loop on all arguments */

	/* By default, save name and timestamp on compression but do not
	 * restore them on decompression.
	 */
	if (no_time < 0) no_time = decompress;
	if (no_name < 0) no_name = decompress;

	file_count = argc - optind;


#if O_BINARY
#else
	if (ascii && !quiet) {
		fprintf(stderr, "%s: option --ascii ignored on this system\n",
				progname);
	}
#endif
	if ((z_len == 0 && !decompress) || z_len > MAX_SUFFIX) {
		fprintf(stderr, "%s: incorrect suffix '%s'\n",
				progname, optarg);
		do_exit(ERROR);
	}
	if (do_lzw && !decompress) work = lzw;

	/* Allocate all global buffers (for DYN_ALLOC option) */
	ALLOC(uch, inbuf,  INBUFSIZ +INBUF_EXTRA);
	ALLOC(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
	ALLOC(ush, d_buf,  DIST_BUFSIZE);
	ALLOC(uch, window, 2L*WSIZE);
#ifndef MAXSEG_64K
	ALLOC(ush, tab_prefix, 1L<<BITS);
#else
	ALLOC(ush, tab_prefix0, 1L<<(BITS-1));
	ALLOC(ush, tab_prefix1, 1L<<(BITS-1));
#endif

	/* And get to work */
	if (file_count != 0) {
		if (to_stdout && !test && !list && (!decompress || !ascii)) {
			SET_BINARY_MODE(fileno(stdout));
		}
		while (optind < argc) {
			struct thread_data td;
			td.thread_id = 0.0;
			strcpy(td.iname, argv[optind]);
			strcpy(td.ifname, argv[optind]);
			strcpy(td.ofname, argv[optind++]);
			printThreadData("main()", td);

			treat_file(&td);
		}
	} else {  /* Standard input */
		treat_stdin();
	}
	if (list && !quiet && file_count > 1) {
		do_list(-1, -1); /* print totals */
	}
	do_exit(exit_code);
	return exit_code; /* just to avoid lint warning */
}


#ifndef NO_DIR

	/* ========================================================================
	 * Recurse through the given directory. This code is taken from ncompress.
	 */
	local void treat_dir(dir)
	char *dir;
	{
		dir_type *dp;
		DIR      *dirp;
		char     nbuf[MAX_PATH_LEN];
		int      len;

		pthread_t threads[MAX_PATH_LEN];

		dirp = opendir(dir);

		if (dirp == NULL) {
			fprintf(stderr, "%s: %s unreadable\n", progname, dir);
			exit_code = ERROR;
			return ;
		}
		/*
		 ** WARNING: the following algorithm could occasionally cause
		 ** compress to produce error warnings of the form "<filename>.gz
		 ** already has .gz suffix - ignored". This occurs when the
		 ** .gz output file is inserted into the directory below
		 ** readdir's current pointer.
		 ** These warnings are harmless but annoying, so they are suppressed
		 ** with option -r (except when -v is on). An alternative
		 ** to allowing this would be to store the entire directory
		 ** list in memory, then compress the entries in the stored
		 ** list. Given the depth-first recursive algorithm used here,
		 ** this could use up a tremendous amount of memory. I don't
		 ** think it's worth it. -- Dave Mack
		 ** (An other alternative might be two passes to avoid depth-first.)
		 */

		int rc;
		long t = 0;
		char x;
		while ((dp = readdir(dirp)) != NULL) {


			//printf("XXX %s\n", dp->d_name);
			// ueberprueft ob file '.' oder '..' und skipped wenn true
			if (strequ(dp->d_name,".") || strequ(dp->d_name,"..") || strequ(dp->d_name,".DS_Store")) {
				continue;
			}

			len = strlen(dir);
			if (len + NLENGTH(dp) + 1 < MAX_PATH_LEN - 1) {
				strcpy(nbuf,dir);
				if (len != 0 /* dir = "" means current dir on Amiga */
					#ifdef PATH_SEP2
						&& dir[len-1] != PATH_SEP2
					#endif
					#ifdef PATH_SEP3
						&& dir[len-1] != PATH_SEP3
					#endif
				) {
					nbuf[len++] = PATH_SEP;
				}
				strcpy(nbuf+len, dp->d_name);

				//printf("HANDLING file: %s\n", nbuf);
				char *copyOfName = strdup(nbuf);

				struct thread_data td;
				td.thread_id = t;
				strcpy(td.iname, copyOfName);
				strcpy(td.ifname, copyOfName);
				strcpy(td.ofname, copyOfName);

				printThreadData("treat_dir()", td);

				rc = pthread_create(&threads[t], NULL, treat_file, (void *)&td);
				if (rc){
					printf("ERROR; return code from pthread_create() is %d\n", rc);
					exit(-1);
				}
			  	t = t+1;
				//treat_file(nbuf);
			} else {
				fprintf(stderr,"%s: %s/%s: pathname too long\n", progname, dir, dp->d_name);
				exit_code = ERROR;
			}
		}

		closedir(dirp);
	}
#endif /* ? NO_DIR */



/* ========================================================================
 * Compress or decompress the given file
 */
local void treat_file(void *td)
{
	struct thread_data *my_data;
	my_data = (struct thread_data *) td;
	printThreadData("treat_file()", *my_data);
	char *iname = my_data->iname;

	//printf("treat_file() -> File: %s | ThreadID: %u | PointerAddress: %p\n", (char *)iname, (unsigned int)pthread_self(), iname);
	sleep(2); // Keep it alive so we're sure the second thread gets a unique ID.

	/* Accept "-" as synonym for stdin */
//	if (strequ(iname, "-")) {
//		int cflag = to_stdout;
//		treat_stdin();
//		to_stdout = cflag;
//		return;
//	}

	/* Check if the input file is present, set ifname and istat: */
	if (get_istat(iname, &istat) != OK) return;

	/* If the input name is that of a directory, recurse or ignore: */
	if (S_ISDIR(istat.st_mode)) {
#ifndef NO_DIR
		if (recursive) {
			struct stat st;
			st = istat;
			printf("INAME is DIR: calling treat_dir(iname)\n");
			treat_dir(iname);
			/* Warning: ifname is now garbage */
#  ifndef NO_UTIME
			reset_times (iname, &st);
#  endif
		} else
#endif
			WARN((stderr,"%s: %s is a directory -- ignored\n", progname, ifname));
		return;
	}
	if (!S_ISREG(istat.st_mode)) {
		WARN((stderr, "%s: %s is not a directory or a regular file - ignored\n", progname, ifname));
		return;
	}
	if (istat.st_nlink > 1 && !to_stdout && !force) {
		WARN((stderr, "%s: %s has %d other link%c -- unchanged\n", progname, ifname, (int)istat.st_nlink - 1, istat.st_nlink > 2 ? 's' : ' '));
		return;
	}

	ifile_size = istat.st_size;
	time_stamp = no_time && !list ? 0 : istat.st_mtime;


	/* Generate output file name. For -r and (-t or -l), skip files
	 * without a valid gzip suffix (check done in make_ofname).
	 */
	if (to_stdout && !list && !test) {
		strcpy(ofname, "stdout");

	} else if (make_ofname() != OK) {
		return;
	}



	/* Open the input file and determine compression method. The mode
	 * parameter is ignored but required by some systems (VMS) and forbidden
	 * on other systems (MacOS).
	 */
	ifd = OPEN(ifname, ascii && !decompress ? O_RDONLY : O_RDONLY | O_BINARY, RW_USER);
	if (ifd == -1) {
		fprintf(stderr, "%s: ", progname);
		perror(ifname);
		exit_code = ERROR;
		return;
	}
	clear_bufs(); /* clear input and output buffers */
	part_nb = 0;

	if (decompress) {
		method = get_method(ifd); /* updates ofname if original given */
		if (method < 0) {
			close(ifd);
			return;               /* error message already emitted */
		}
	}
	if (list) {
		do_list(ifd, method);
		close(ifd);
		return;
	}

	int ofdNew = 0;
	/* If compressing to a file, check if ofname is not ambiguous
	 * because the operating system truncates names. Otherwise, generate
	 * a new ofname and save the original name in the compressed file.
	 */
	if (to_stdout) {
		ofd = fileno(stdout);
		/* keep remove_ofname as zero */
	} else {
		printf("\nBefore create_outfile() -> ofname = %s\n", ofname);
		if (create_outfile() != OK) {
			return;
		} else {
			ofdNew = ofd;
		}

		if (!decompress && save_orig_name && !verbose && !quiet) {
			fprintf(stderr, "%s: %s compressed to %s\n", progname, ifname, ofname);
		}
	}
	/* Keep the name even if not truncated except with --no-name: */
	if (!save_orig_name) save_orig_name = !no_name;

	if (verbose) {
		fprintf(stderr, "%s:\t%s", ifname, (int)strlen(ifname) >= 15 ?
				"" : ((int)strlen(ifname) >= 7 ? "\t" : "\t\t"));
	}

	/* Actually do the compression/decompression. Loop over zipped members.
	 */
	for (;;) {
		printf("InputFD = %d | OutputFD = %d | ThreadID: %u | PointerAddress: %p\n", ifd, ofd, (unsigned int)pthread_self(), iname);

		int x = (*work)(ifd, ofdNew);
		printf("CALLED: %d", x);
		if (x != OK) {
			method = -1; /* force cleanup */
			break;
		}
		if (!decompress || last_member || inptr == insize) break;
		/* end of file */

		method = get_method(ifd);
		if (method < 0) break;    /* error message already emitted */
		bytes_out = 0;            /* required for length check */
	}

	close(ifd);
	if (!to_stdout && close(ofd)) {
		write_error();
	}
	if (method == -1) {
		if (!to_stdout) unlink (ofname);
		return;
	}
	/* Display statistics */
	if(verbose) {
		if (test) {
			fprintf(stderr, " OK");
		} else if (decompress) {
			display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out,stderr);
		} else {
			display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
		}
		if (!test && !to_stdout) {
			fprintf(stderr, " -- replaced with %s", ofname);
		}
		fprintf(stderr, "\n");
	}
	/* Copy modes, times, ownership, and remove the input file */
	if (!to_stdout) {
		copy_stat(&istat);
	}
}

/* ========================================================================
 * Create the output file. Return OK or ERROR.
 * Try several times if necessary to avoid truncating the z_suffix. For
 * example, do not create a compressed file of name "1234567890123."
 * Sets save_orig_name to true if the file name has been truncated.
 * IN assertions: the input file has already been open (ifd is set) and
 *   ofname has already been updated if there was an original name.
 * OUT assertions: ifd and ofd are closed in case of error.
 */
local int create_outfile()
{
	struct stat	ostat; /* stat for ofname */
	int flags = O_WRONLY | O_CREAT | O_EXCL | O_BINARY;

	if (ascii && decompress) {
		flags &= ~O_BINARY; /* force ascii text mode */
	}
	for (;;) {
		/* Make sure that ofname is not an existing file */
		if (check_ofname() != OK) {
			close(ifd);
			return ERROR;
		}
		/* Create the output file */
		remove_ofname = 1;
		printf("create_outfile(): ofname=%s\n", ofname);
		ofd = OPEN(ofname, flags, RW_USER);
		if (ofd == -1) {
			perror(ofname);
			close(ifd);
			exit_code = ERROR;
			return ERROR;
		}

		/* Check for name truncation on new file (1234567890123.gz) */
#ifdef NO_FSTAT
		if (stat(ofname, &ostat) != 0) {
#else
			if (fstat(ofd, &ostat) != 0) {
#endif
				fprintf(stderr, "%s: ", progname);
				perror(ofname);
				close(ifd); close(ofd);
				unlink(ofname);
				exit_code = ERROR;
				return ERROR;
			}
			if (!name_too_long(ofname, &ostat)) return OK;

			if (decompress) {
				/* name might be too long if an original name was saved */
				WARN((stderr, "%s: %s: warning, name truncated\n",
						progname, ofname));
				return OK;
			}
			close(ofd);
			unlink(ofname);
#ifdef NO_MULTIPLE_DOTS
			/* Should never happen, see check_ofname() */
			fprintf(stderr, "%s: %s: name too long\n", progname, ofname);
			do_exit(ERROR);
#endif
			shorten_name(ofname);
		}
	}

	/* ========================================================================
	 * Use lstat if available, except for -c or -f. Use stat otherwise.
	 * This allows links when not removing the original file.
	 */
	local int do_stat(name, sbuf)
	char *name;
	struct stat *sbuf;
	{
		errno = 0;
#if (defined(S_IFLNK) || defined (S_ISLNK)) && !defined(NO_SYMLINK)
		if (!to_stdout && !force) {
			return lstat(name, sbuf);
		}
#endif
		return stat(name, sbuf);
	}

	/* ========================================================================
	 * Return a pointer to the 'z' suffix of a file name, or NULL. For all
	 * systems, ".gz", ".z", ".Z", ".taz", ".tgz", "-gz", "-z" and "_z" are
	 * accepted suffixes, in addition to the value of the --suffix option.
	 * ".tgz" is a useful convention for tar.z files on systems limited
	 * to 3 characters extensions. On such systems, ".?z" and ".??z" are
	 * also accepted suffixes. For Unix, we do not want to accept any
	 * .??z suffix as indicating a compressed file; some people use .xyz
	 * to denote volume data.
	 *   On systems allowing multiple versions of the same file (such as VMS),
	 * this function removes any version suffix in the given name.
	 */
	local char *get_suffix(name)
	char *name;
	{
		int nlen, slen;
		char suffix[MAX_SUFFIX+3]; /* last chars of name, forced to lower case */
		static char *known_suffixes[] =
		{z_suffix, ".gz", ".z", ".taz", ".tgz", "-gz", "-z", "_z",
#ifdef MAX_EXT_CHARS
				"z",
#endif
				NULL};
		char **suf = known_suffixes;

		if (strequ(z_suffix, "z")) suf++; /* check long suffixes first */

#ifdef SUFFIX_SEP
		/* strip a version number from the file name */
		{
			char *v = strrchr(name, SUFFIX_SEP);
			if (v != NULL) *v = '\0';
		}
#endif
		nlen = strlen(name);
		if (nlen <= MAX_SUFFIX+2) {
			strcpy(suffix, name);
		} else {
			strcpy(suffix, name+nlen-MAX_SUFFIX-2);
		}
		strlwr(suffix);
		slen = strlen(suffix);
		do {
			int s = strlen(*suf);
			if (slen > s && suffix[slen-s-1] != PATH_SEP
					&& strequ(suffix + slen - s, *suf)) {
				return name+nlen-s;
			}
		} while (*++suf != NULL);

		return NULL;
	}


	/* ========================================================================
	 * Set ifname to the input file name (with a suffix appended if necessary)
	 * and istat to its stats. For decompression, if no file exists with the
	 * original name, try adding successively z_suffix, .gz, .z, -z and .Z.
	 * For MSDOS, we try only z_suffix and z.
	 * Return OK or ERROR.
	 */
	local int get_istat(iname, sbuf)
	char *iname;
	struct stat *sbuf;
	{
		int ilen;  /* strlen(ifname) */
		static char *suffixes[] = {z_suffix, ".gz", ".z", "-z", ".Z", NULL};
		char **suf = suffixes;
		char *s;
#ifdef NO_MULTIPLE_DOTS
		char *dot; /* pointer to ifname extension, or NULL */
#endif

		strcpy(ifname, iname);

		/* If input file exists, return OK. */
		if (do_stat(ifname, sbuf) == 0) return OK;

		if (!decompress || errno != ENOENT) {
			perror(ifname);
			exit_code = ERROR;
			return ERROR;
		}
		/* file.ext doesn't exist, try adding a suffix (after removing any
		 * version number for VMS).
		 */
		s = get_suffix(ifname);
		if (s != NULL) {
			perror(ifname); /* ifname already has z suffix and does not exist */
			exit_code = ERROR;
			return ERROR;
		}
#ifdef NO_MULTIPLE_DOTS
		dot = strrchr(ifname, '.');
		if (dot == NULL) {
			strcat(ifname, ".");
			dot = strrchr(ifname, '.');
		}
#endif
		ilen = strlen(ifname);
		if (strequ(z_suffix, ".gz")) suf++;

		/* Search for all suffixes */
		do {
			s = *suf;
#ifdef NO_MULTIPLE_DOTS
			if (*s == '.') s++;
#endif
#ifdef MAX_EXT_CHARS
			strcpy(ifname, iname);
			/* Needed if the suffixes are not sorted by increasing length */

			if (*dot == '\0') strcpy(dot, ".");
			dot[MAX_EXT_CHARS+1-strlen(s)] = '\0';
#endif
			strcat(ifname, s);
			if (do_stat(ifname, sbuf) == 0) return OK;
			ifname[ilen] = '\0';
		} while (*++suf != NULL);

		/* No suffix found, complain using z_suffix: */
#ifdef MAX_EXT_CHARS
		strcpy(ifname, iname);
		if (*dot == '\0') strcpy(dot, ".");
		dot[MAX_EXT_CHARS+1-z_len] = '\0';
#endif
		strcat(ifname, z_suffix);
		perror(ifname);
		exit_code = ERROR;
		return ERROR;
	}

	/* ========================================================================
	 * Generate ofname given ifname. Return OK, or WARNING if file must be skipped.
	 * Sets save_orig_name to true if the file name has been truncated.
	 */
	local int make_ofname()
	{
		char *suff;            /* ofname z suffix */

		strcpy(ofname, ifname);
		/* strip a version number if any and get the gzip suffix if present: */
		suff = get_suffix(ofname);

		if (decompress) {
			if (suff == NULL) {
				/* Whith -t or -l, try all files (even without .gz suffix)
				 * except with -r (behave as with just -dr).
				 */
				if (!recursive && (list || test)) return OK;

				/* Avoid annoying messages with -r */
				if (verbose || (!recursive && !quiet)) {
					WARN((stderr,"%s: %s: unknown suffix -- ignored\n",
							progname, ifname));
				}
				return WARNING;
			}
			/* Make a special case for .tgz and .taz: */
			strlwr(suff);
			if (strequ(suff, ".tgz") || strequ(suff, ".taz")) {
				strcpy(suff, ".tar");
			} else {
				*suff = '\0'; /* strip the z suffix */
			}
			/* ofname might be changed later if infile contains an original name */

		} else if (suff != NULL) {
			/* Avoid annoying messages with -r (see treat_dir()) */
			if (verbose || (!recursive && !quiet)) {
				fprintf(stderr, "%s: %s already has %s suffix -- unchanged\n",
						progname, ifname, suff);
			}
			if (exit_code == OK) exit_code = WARNING;
			return WARNING;
		} else {
			save_orig_name = 0;

#ifdef NO_MULTIPLE_DOTS
			suff = strrchr(ofname, '.');
			if (suff == NULL) {
				strcat(ofname, ".");
#  ifdef MAX_EXT_CHARS
				if (strequ(z_suffix, "z")) {
					strcat(ofname, "gz"); /* enough room */
					return OK;
				}
				/* On the Atari and some versions of MSDOS, name_too_long()
				 * does not work correctly because of a bug in stat(). So we
				 * must truncate here.
				 */
			} else if (strlen(suff)-1 + z_len > MAX_SUFFIX) {
				suff[MAX_SUFFIX+1-z_len] = '\0';
				save_orig_name = 1;
#  endif
			}
#endif /* NO_MULTIPLE_DOTS */
			strcat(ofname, z_suffix);

		} /* decompress ? */
		return OK;
	}


	/* ========================================================================
	 * Check the magic number of the input file and update ofname if an
	 * original name was given and to_stdout is not set.
	 * Return the compression method, -1 for error, -2 for warning.
	 * Set inptr to the offset of the next byte to be processed.
	 * Updates time_stamp if there is one and --no-time is not used.
	 * This function may be called repeatedly for an input file consisting
	 * of several contiguous gzip'ed members.
	 * IN assertions: there is at least one remaining compressed member.
	 *   If the member is a zip file, it must be the only one.
	 */
	local int get_method(in)
	int in;        /* input file descriptor */
	{
		uch flags;     /* compression flags */
		char magic[2]; /* magic header */
		ulg stamp;     /* time stamp */

		/* If --force and --stdout, zcat == cat, so do not complain about
		 * premature end of file: use try_byte instead of get_byte.
		 */
		if (force && to_stdout) {
			magic[0] = (char)try_byte();
			magic[1] = (char)try_byte();
			/* If try_byte returned EOF, magic[1] == 0xff */
		} else {
			magic[0] = (char)get_byte();
			magic[1] = (char)get_byte();
		}
		method = -1;                 /* unknown yet */
		part_nb++;                   /* number of parts in gzip file */
		header_bytes = 0;
		last_member = RECORD_IO;
		/* assume multiple members in gzip file except for record oriented I/O */

		if (memcmp(magic, GZIP_MAGIC, 2) == 0
				|| memcmp(magic, OLD_GZIP_MAGIC, 2) == 0) {

			method = (int)get_byte();
			if (method != DEFLATED) {
				fprintf(stderr,
						"%s: %s: unknown method %d -- get newer version of gzip\n",
						progname, ifname, method);
				exit_code = ERROR;
				return -1;
			}
			work = unzip;
			flags  = (uch)get_byte();

			if ((flags & ENCRYPTED) != 0) {
				fprintf(stderr,
						"%s: %s is encrypted -- get newer version of gzip\n",
						progname, ifname);
				exit_code = ERROR;
				return -1;
			}
			if ((flags & CONTINUATION) != 0) {
				fprintf(stderr,
						"%s: %s is a a multi-part gzip file -- get newer version of gzip\n",
						progname, ifname);
				exit_code = ERROR;
				if (force <= 1) return -1;
			}
			if ((flags & RESERVED) != 0) {
				fprintf(stderr,
						"%s: %s has flags 0x%x -- get newer version of gzip\n",
						progname, ifname, flags);
				exit_code = ERROR;
				if (force <= 1) return -1;
			}
			stamp  = (ulg)get_byte();
			stamp |= ((ulg)get_byte()) << 8;
			stamp |= ((ulg)get_byte()) << 16;
			stamp |= ((ulg)get_byte()) << 24;
			if (stamp != 0 && !no_time) time_stamp = stamp;

			(void)get_byte();  /* Ignore extra flags for the moment */
			(void)get_byte();  /* Ignore OS type for the moment */

			if ((flags & CONTINUATION) != 0) {
				unsigned part = (unsigned)get_byte();
				part |= ((unsigned)get_byte())<<8;
				if (verbose) {
					fprintf(stderr,"%s: %s: part number %u\n",
							progname, ifname, part);
				}
			}
			if ((flags & EXTRA_FIELD) != 0) {
				unsigned len = (unsigned)get_byte();
				len |= ((unsigned)get_byte())<<8;
				if (verbose) {
					fprintf(stderr,"%s: %s: extra field of %u bytes ignored\n",
							progname, ifname, len);
				}
				while (len--) (void)get_byte();
			}

			/* Get original file name if it was truncated */
			if ((flags & ORIG_NAME) != 0) {
				if (no_name || (to_stdout && !list) || part_nb > 1) {
					/* Discard the old name */
					char c; /* dummy used for NeXTstep 3.0 cc optimizer bug */
					do {c=get_byte();} while (c != 0);
				} else {
					/* Copy the base name. Keep a directory prefix intact. */
					char *p = basename(ofname);
					char *base = p;
					for (;;) {
						*p = (char)get_char();
						if (*p++ == '\0') break;
						if (p >= ofname+sizeof(ofname)) {
							error("corrupted input -- file name too large");
						}
					}
					/* If necessary, adapt the name to local OS conventions: */
					if (!list) {
						MAKE_LEGAL_NAME(base);
						if (base) list=0; /* avoid warning about unused variable */
					}
				} /* no_name || to_stdout */
			} /* ORIG_NAME */

			/* Discard file comment if any */
			if ((flags & COMMENT) != 0) {
				while (get_char() != 0) /* null */ ;
			}
			if (part_nb == 1) {
				header_bytes = inptr + 2*sizeof(long); /* include crc and size */
			}

		} else if (memcmp(magic, PKZIP_MAGIC, 2) == 0 && inptr == 2
				&& memcmp((char*)inbuf, PKZIP_MAGIC, 4) == 0) {
			/* To simplify the code, we support a zip file when alone only.
			 * We are thus guaranteed that the entire local header fits in inbuf.
			 */
			inptr = 0;
			work = unzip;
			if (check_zipfile(in) != OK) return -1;
			/* check_zipfile may get ofname from the local header */
			last_member = 1;

		} else if (memcmp(magic, PACK_MAGIC, 2) == 0) {
			work = unpack;
			method = PACKED;

		} else if (memcmp(magic, LZW_MAGIC, 2) == 0) {
			work = unlzw;
			method = COMPRESSED;
			last_member = 1;

		} else if (memcmp(magic, LZH_MAGIC, 2) == 0) {
			work = unlzh;
			method = LZHED;
			last_member = 1;

		} else if (force && to_stdout && !list) { /* pass input unchanged */
			method = STORED;
			work = copy;
			inptr = 0;
			last_member = 1;
		}
		if (method >= 0) return method;

		if (part_nb == 1) {
			fprintf(stderr, "\n%s: %s: not in gzip format\n", progname, ifname);
			exit_code = ERROR;
			return -1;
		} else {
			WARN((stderr, "\n%s: %s: decompression OK, trailing garbage ignored\n",
					progname, ifname));
			return -2;
		}
	}

	/* ========================================================================
	 * Display the characteristics of the compressed file.
	 * If the given method is < 0, display the accumulated totals.
	 * IN assertions: time_stamp, header_bytes and ifile_size are initialized.
	 */
	local void do_list(ifd, method)
	int ifd;     /* input file descriptor */
	int method;  /* compression method */
	{
		ulg crc;  /* original crc */
		static int first_time = 1;
		static char* methods[MAX_METHODS] = {
				"store",  /* 0 */
				"compr",  /* 1 */
				"pack ",  /* 2 */
				"lzh  ",  /* 3 */
				"", "", "", "", /* 4 to 7 reserved */
				"defla"}; /* 8 */
		char *date;

		if (first_time && method >= 0) {
			first_time = 0;
			if (verbose)  {
				printf("method  crc     date  time  ");
			}
			if (!quiet) {
				printf("compressed  uncompr. ratio uncompressed_name\n");
			}
		} else if (method < 0) {
			if (total_in <= 0 || total_out <= 0) return;
			if (verbose) {
				printf("                            %9lu %9lu ",
						total_in, total_out);
			} else if (!quiet) {
				printf("%9ld %9ld ", total_in, total_out);
			}
			display_ratio(total_out-(total_in-header_bytes), total_out, stdout);
			/* header_bytes is not meaningful but used to ensure the same
			 * ratio if there is a single file.
			 */
			printf(" (totals)\n");
			return;
		}
		crc = (ulg)~0; /* unknown */
		bytes_out = -1L;
		bytes_in = ifile_size;

#if RECORD_IO == 0
		if (method == DEFLATED && !last_member) {
			/* Get the crc and uncompressed size for gzip'ed (not zip'ed) files.
			 * If the lseek fails, we could use read() to get to the end, but
			 * --list is used to get quick results.
			 * Use "gunzip < foo.gz | wc -c" to get the uncompressed size if
			 * you are not concerned about speed.
			 */
			bytes_in = (long)lseek(ifd, (off_t)(-8), SEEK_END);
			if (bytes_in != -1L) {
				uch buf[8];
				bytes_in += 8L;
				if (read(ifd, (char*)buf, sizeof(buf)) != sizeof(buf)) {
					read_error();
				}
				crc       = LG(buf);
				bytes_out = LG(buf+4);
			}
		}
#endif /* RECORD_IO */
		date = ctime((time_t*)&time_stamp) + 4; /* skip the day of the week */
		date[12] = '\0';               /* suppress the 1/100sec and the year */
		if (verbose) {
			printf("%5s %08lx %11s ", methods[method], crc, date);
		}
		printf("%9ld %9ld ", bytes_in, bytes_out);
		if (bytes_in  == -1L) {
			total_in = -1L;
			bytes_in = bytes_out = header_bytes = 0;
		} else if (total_in >= 0) {
			total_in  += bytes_in;
		}
		if (bytes_out == -1L) {
			total_out = -1L;
			bytes_in = bytes_out = header_bytes = 0;
		} else if (total_out >= 0) {
			total_out += bytes_out;
		}
		display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out, stdout);
		printf(" %s\n", ofname);
	}

	/* ========================================================================
	 * Return true if the two stat structures correspond to the same file.
	 */
	local int same_file(stat1, stat2)
	struct stat *stat1;
	struct stat *stat2;
	{
		return stat1->st_ino   == stat2->st_ino
				&& stat1->st_dev   == stat2->st_dev
#ifdef NO_ST_INO
				/* Can't rely on st_ino and st_dev, use other fields: */
				&& stat1->st_mode  == stat2->st_mode
				&& stat1->st_uid   == stat2->st_uid
				&& stat1->st_gid   == stat2->st_gid
				&& stat1->st_size  == stat2->st_size
				&& stat1->st_atime == stat2->st_atime
				&& stat1->st_mtime == stat2->st_mtime
				&& stat1->st_ctime == stat2->st_ctime
#endif
				;
	}

	/* ========================================================================
	 * Return true if a file name is ambiguous because the operating system
	 * truncates file names.
	 */
	local int name_too_long(name, statb)
	char *name;           /* file name to check */
	struct stat *statb;   /* stat buf for this file name */
	{
		int s = strlen(name);
		char c = name[s-1];
		struct stat	tstat; /* stat for truncated name */
		int res;

		tstat = *statb;      /* Just in case OS does not fill all fields */
		name[s-1] = '\0';
		res = stat(name, &tstat) == 0 && same_file(statb, &tstat);
		name[s-1] = c;
		Trace((stderr, " too_long(%s) => %d\n", name, res));
		return res;
	}

	/* ========================================================================
	 * Shorten the given name by one character, or replace a .tar extension
	 * with .tgz. Truncate the last part of the name which is longer than
	 * MIN_PART characters: 1234.678.012.gz -> 123.678.012.gz. If the name
	 * has only parts shorter than MIN_PART truncate the longest part.
	 * For decompression, just remove the last character of the name.
	 *
	 * IN assertion: for compression, the suffix of the given name is z_suffix.
	 */
	local void shorten_name(name)
	char *name;
	{
		int len;                 /* length of name without z_suffix */
		char *trunc = NULL;      /* character to be truncated */
		int plen;                /* current part length */
		int min_part = MIN_PART; /* current minimum part length */
		char *p;

		len = strlen(name);
		if (decompress) {
			if (len <= 1) error("name too short");
			name[len-1] = '\0';
			return;
		}
		p = get_suffix(name);
		if (p == NULL) error("can't recover suffix\n");
		*p = '\0';
		save_orig_name = 1;

		/* compress 1234567890.tar to 1234567890.tgz */
		if (len > 4 && strequ(p-4, ".tar")) {
			strcpy(p-4, ".tgz");
			return;
		}
		/* Try keeping short extensions intact:
		 * 1234.678.012.gz -> 123.678.012.gz
		 */
		do {
			p = strrchr(name, PATH_SEP);
			p = p ? p+1 : name;
			while (*p) {
				plen = strcspn(p, PART_SEP);
				p += plen;
				if (plen > min_part) trunc = p-1;
				if (*p) p++;
			}
		} while (trunc == NULL && --min_part != 0);

		if (trunc != NULL) {
			do {
				trunc[0] = trunc[1];
			} while (*trunc++);
			trunc--;
		} else {
			trunc = strrchr(name, PART_SEP[0]);
			if (trunc == NULL) error("internal error in shorten_name");
			if (trunc[1] == '\0') trunc--; /* force truncation */
		}
		strcpy(trunc, z_suffix);
	}

	/* ========================================================================
	 * If compressing to a file, check if ofname is not ambiguous
	 * because the operating system truncates names. Otherwise, generate
	 * a new ofname and save the original name in the compressed file.
	 * If the compressed file already exists, ask for confirmation.
	 *    The check for name truncation is made dynamically, because different
	 * file systems on the same OS might use different truncation rules (on SVR4
	 * s5 truncates to 14 chars and ufs does not truncate).
	 *    This function returns -1 if the file must be skipped, and
	 * updates save_orig_name if necessary.
	 * IN assertions: save_orig_name is already set if ofname has been
	 * already truncated because of NO_MULTIPLE_DOTS. The input file has
	 * already been open and istat is set.
	 */
	local int check_ofname()
	{
		struct stat	ostat; /* stat for ofname */

#ifdef ENAMETOOLONG
		/* Check for strictly conforming Posix systems (which return ENAMETOOLONG
		 * instead of silently truncating filenames).
		 */
		errno = 0;
		while (stat(ofname, &ostat) != 0) {
			if (errno != ENAMETOOLONG) return 0; /* ofname does not exist */
			shorten_name(ofname);
		}
#else
		if (stat(ofname, &ostat) != 0) return 0;
#endif
		/* Check for name truncation on existing file. Do this even on systems
		 * defining ENAMETOOLONG, because on most systems the strict Posix
		 * behavior is disabled by default (silent name truncation allowed).
		 */
		if (!decompress && name_too_long(ofname, &ostat)) {
			shorten_name(ofname);
			if (stat(ofname, &ostat) != 0) return 0;
		}

		/* Check that the input and output files are different (could be
		 * the same by name truncation or links).
		 */
		if (same_file(&istat, &ostat)) {
			if (strequ(ifname, ofname)) {
				fprintf(stderr, "%s: %s: cannot %scompress onto itself\n",
						progname, ifname, decompress ? "de" : "");
			} else {
				fprintf(stderr, "%s: %s and %s are the same file\n",
						progname, ifname, ofname);
			}
			exit_code = ERROR;
			return ERROR;
		}
		/* Ask permission to overwrite the existing file */
		if (!force) {
			char response[80];
			strcpy(response,"n");
			fprintf(stderr, "%s: %s already exists;", progname, ofname);
			if (foreground && isatty(fileno(stdin))) {
				fprintf(stderr, " do you wish to overwrite (y or n)? ");
				fflush(stderr);
				(void)fgets(response, sizeof(response)-1, stdin);
			}
			if (tolow(*response) != 'y') {
				fprintf(stderr, "\tnot overwritten\n");
				if (exit_code == OK) exit_code = WARNING;
				return ERROR;
			}
		}
		(void) chmod(ofname, 0777);
		if (unlink(ofname)) {
			fprintf(stderr, "%s: ", progname);
			perror(ofname);
			exit_code = ERROR;
			return ERROR;
		}
		return OK;
	}


#ifndef NO_UTIME
	/* ========================================================================
	 * Set the access and modification times from the given stat buffer.
	 */
	local void reset_times (name, statb)
	char *name;
	struct stat *statb;
	{
		struct utimbuf	timep;

		/* Copy the time stamp */
		timep.actime  = statb->st_atime;
		timep.modtime = statb->st_mtime;

		/* Some systems (at least OS/2) do not support utime on directories */
		if (utime(name, &timep) && !S_ISDIR(statb->st_mode)) {
			WARN((stderr, "%s: ", progname));
			if (!quiet) perror(ofname);
		}
	}
#endif


	/* ========================================================================
	 * Copy modes, times, ownership from input file to output file.
	 * IN assertion: to_stdout is false.
	 */
	local void copy_stat(ifstat)
	struct stat *ifstat;
	{
#ifndef NO_UTIME
		if (decompress && time_stamp != 0 && ifstat->st_mtime != time_stamp) {
			ifstat->st_mtime = time_stamp;
			if (verbose > 1) {
				fprintf(stderr, "%s: time stamp restored\n", ofname);
			}
		}
		reset_times(ofname, ifstat);
#endif
		/* Copy the protection modes */
		if (chmod(ofname, ifstat->st_mode & 07777)) {
			WARN((stderr, "%s: ", progname));
			if (!quiet) perror(ofname);
		}
#ifndef NO_CHOWN
		chown(ofname, ifstat->st_uid, ifstat->st_gid);  /* Copy ownership */
#endif
		remove_ofname = 0;
		/* It's now safe to remove the input file: */
		(void) chmod(ifname, 0777);
		if (unlink(ifname)) {
			WARN((stderr, "%s: ", progname));
			if (!quiet) perror(ifname);
		}
	}


	/* ========================================================================
	 * Free all dynamically allocated variables and exit with the given code.
	 */
	local void do_exit(exitcode)
	int exitcode;
	{
		static int in_exit = 0;

		pthread_exit(NULL);

		if (in_exit) exit(exitcode);
		in_exit = 1;
		if (env != NULL)  free(env),  env  = NULL;
		if (args != NULL) free((char*)args), args = NULL;
		FREE(inbuf);
		FREE(outbuf);
		FREE(d_buf);
		FREE(window);
#ifndef MAXSEG_64K
		FREE(tab_prefix);
#else
		FREE(tab_prefix0);
		FREE(tab_prefix1);
#endif
		exit(exitcode);
	}

	/* ========================================================================
	 * Signal and error handler.
	 */
	RETSIGTYPE abort_gzip()
	{
		if (remove_ofname) {
			close(ofd);
			unlink (ofname);
		}
		do_exit(ERROR);
	}


/* ----------------------------------------------------------------------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------------------------------------------------------------------- */
/* --------------------------------------NOT INTERESTING STUFF------------------------------------------------------------------------------ */
/* ----------------------------------------------------------------------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------------------------------------------------------------------- */

	/* ======================================================================== */
	local void license()
	{
		char **p = license_msg;

		fprintf(stderr,"%s %s (%s)\n", progname, VERSION, REVDATE);
		while (*p) fprintf(stderr, "%s\n", *p++);
	}

	/* ======================================================================== */
	local void version()
	{
		fprintf(stderr,"%s %s (%s)\n", progname, VERSION, REVDATE);

		fprintf(stderr, "Compilation options:\n%s %s ", DIR_OPT, TIME_OPT);
	#ifdef STDC_HEADERS
		fprintf(stderr, "STDC_HEADERS ");
	#endif
	#ifdef HAVE_UNISTD_H
		fprintf(stderr, "HAVE_UNISTD_H ");
	#endif
	#ifdef NO_MEMORY_H
		fprintf(stderr, "NO_MEMORY_H ");
	#endif
	#ifdef NO_STRING_H
		fprintf(stderr, "NO_STRING_H ");
	#endif
	#ifdef NO_SYMLINK
		fprintf(stderr, "NO_SYMLINK ");
	#endif
	#ifdef NO_MULTIPLE_DOTS
		fprintf(stderr, "NO_MULTIPLE_DOTS ");
	#endif
	#ifdef NO_CHOWN
		fprintf(stderr, "NO_CHOWN ");
	#endif
	#ifdef PROTO
		fprintf(stderr, "PROTO ");
	#endif
	#ifdef ASMV
		fprintf(stderr, "ASMV ");
	#endif
	#ifdef DEBUG
		fprintf(stderr, "DEBUG ");
	#endif
	#ifdef DYN_ALLOC
		fprintf(stderr, "DYN_ALLOC ");
	#endif
	#ifdef MAXSEG_64K
		fprintf(stderr, "MAXSEG_64K");
	#endif
		fprintf(stderr, "\n");
	}

	/* ======================================================================== */
	local void help()
	{
		static char  *help_msg[] = {
	#if O_BINARY
				" -a --ascii       ascii text; convert end-of-lines using local conventions",
	#endif
				" -c --stdout      write on standard output, keep original files unchanged",
				" -d --decompress  decompress",
				/* -e --encrypt     encrypt */
				" -f --force       force overwrite of output file and compress links",
				" -h --help        give this help",
				/* -k --pkzip       force output in pkzip format */
				" -l --list        list compressed file contents",
				" -L --license     display software license",
	#ifdef UNDOCUMENTED
				" -m --no-time     do not save or restore the original modification time",
				" -M --time        save or restore the original modification time",
	#endif
				" -n --no-name     do not save or restore the original name and time stamp",
				" -N --name        save or restore the original name and time stamp",
				" -q --quiet       suppress all warnings",
	#ifndef NO_DIR
				" -r --recursive   operate recursively on directories",
	#endif
				" -S .suf  --suffix .suf     use suffix .suf on compressed files",
				" -t --test        test compressed file integrity",
				" -v --verbose     verbose mode",
				" -V --version     display version number",
				" -1 --fast        compress faster",
				" -9 --best        compress better",
	#ifdef LZW
				" -Z --lzw         produce output compatible with old compress",
				" -b --bits maxbits   max number of bits per code (implies -Z)",
	#endif
				" file...          files to (de)compress. If none given, use standard input.",
				0};
		char **p = help_msg;

		fprintf(stderr,"%s %s (%s)\n", progname, VERSION, REVDATE);
		usage();
		while (*p) fprintf(stderr, "%s\n", *p++);
	}

	/* ========================================================================
	 * Compress or decompress stdin
	 */
	local void treat_stdin()
	{
		if (!force && !list &&
				isatty(fileno((FILE *)(decompress ? stdin : stdout)))) {
			/* Do not send compressed data to the terminal or read it from
			 * the terminal. We get here when user invoked the program
			 * without parameters, so be helpful. According to the GNU standards:
			 *
			 *   If there is one behavior you think is most useful when the output
			 *   is to a terminal, and another that you think is most useful when
			 *   the output is a file or a pipe, then it is usually best to make
			 *   the default behavior the one that is useful with output to a
			 *   terminal, and have an option for the other behavior.
			 *
			 * Here we use the --force option to get the other behavior.
			 */
			fprintf(stderr,
					"%s: compressed data not %s a terminal. Use -f to force %scompression.\n",
					progname, decompress ? "read from" : "written to",
							decompress ? "de" : "");
			fprintf(stderr,"For help, type: %s -h\n", progname);
			do_exit(ERROR);
		}

		if (decompress || !ascii) {
			SET_BINARY_MODE(fileno(stdin));
		}
		if (!test && !list && (!decompress || !ascii)) {
			SET_BINARY_MODE(fileno(stdout));
		}
		strcpy(ifname, "stdin");
		strcpy(ofname, "stdout");

		/* Get the time stamp on the input file. */
		time_stamp = 0; /* time unknown by default */

	#ifndef NO_STDIN_FSTAT
		if (list || !no_time) {
			if (fstat(fileno(stdin), &istat) != 0) {
				error("fstat(stdin)");
			}
	# ifdef NO_PIPE_TIMESTAMP
			if (S_ISREG(istat.st_mode))
	# endif
				time_stamp = istat.st_mtime;
	#endif /* NO_STDIN_FSTAT */
		}
		ifile_size = -1L; /* convention for unknown size */

		clear_bufs(); /* clear input and output buffers */
		to_stdout = 1;
		part_nb = 0;

		if (decompress) {
			method = get_method(ifd);
			if (method < 0) {
				do_exit(exit_code); /* error message already emitted */
			}
		}
		if (list) {
			do_list(ifd, method);
			return;
		}

		/* Actually do the compression/decompression. Loop over zipped members.
		 */
		for (;;) {
			if ((*work)(fileno(stdin), fileno(stdout)) != OK) return;

			if (!decompress || last_member || inptr == insize) break;
			/* end of file */

			method = get_method(ifd);
			if (method < 0) return; /* error message already emitted */
			bytes_out = 0;            /* required for length check */
		}

		if (verbose) {
			if (test) {
				fprintf(stderr, " OK\n");

			} else if (!decompress) {
				display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
				fprintf(stderr, "\n");
	#ifdef DISPLAY_STDIN_RATIO
			} else {
				display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out,stderr);
				fprintf(stderr, "\n");
	#endif
			}
		}
	}
